<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package        CodeIgniter
 * @author        ExpressionEngine Dev Team
 * @copyright    Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license        http://codeigniter.com/user_guide/license.html
 * @link        http://codeigniter.com
 * @since        Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Parser Class
 *
 * @package        CodeIgniter
 * @subpackage    Libraries
 * @category    Parser
 * @author        ExpressionEngine Dev Team
 * @link        http://codeigniter.com/user_guide/libraries/parser.html
 */
class CI_Parser
{

    var $l_delim = '{';
    var $r_delim = '}';
    var $object;

    /**
     *  Parse a template
     *
     * Parses pseudo-variables contained in the specified template view,
     * replacing them with the data in the second param
     *
     * @access    public
     * @param    string
     * @param    array
     * @param    bool
     * @return    string
     */
    public function parse($template, $data, $return = FALSE)
    {
        $CI =& get_instance();
        $template = $CI->load->view($template, $data, TRUE);

        return $this->_parse($template, $data, $return);
    }

    // --------------------------------------------------------------------

    /**
     *  Parse a String
     *
     * Parses pseudo-variables contained in the specified string,
     * replacing them with the data in the second param
     *
     * @access    public
     * @param    string
     * @param    array
     * @param    bool
     * @return    string
     */
    function parse_string($template, $data, $return = FALSE)
    {
        return $this->_parse($template, $data, $return);
    }

    // --------------------------------------------------------------------

    /**
     *  Parse a template
     *
     * Parses pseudo-variables contained in the specified template,
     * replacing them with the data in the second param
     *
     * @access    public
     * @param    string
     * @param    array
     * @param    bool
     * @return    string
     */
    function _parse($template, $data, $return = FALSE)
    {
        if ($template == '') {
            return FALSE;
        }

        foreach ($data as $key => $val) {
            if (is_array($val)) {
                $template = $this->_parse_pair($key, $val, $template);
            } else {
                $template = $this->_parse_single($key, (string)$val, $template);
            }
        }

        if ($return == FALSE) {
            $CI =& get_instance();
            $CI->output->append_output($template);
        }

        return $template;
    }

    // --------------------------------------------------------------------

    /**
     *  Set the left/right variable delimiters
     *
     * @access    public
     * @param    string
     * @param    string
     * @return    void
     */
    function set_delimiters($l = '{', $r = '}')
    {
        $this->l_delim = $l;
        $this->r_delim = $r;
    }

    // --------------------------------------------------------------------

    /**
     *  Parse a single key/value
     *
     * @access    private
     * @param    string
     * @param    string
     * @param    string
     * @return    string
     */
    function _parse_single($key, $val, $string)
    {
        return str_replace($this->l_delim . $key . $this->r_delim, $val, $string);
    }

    // --------------------------------------------------------------------

    /**
     *  Parse a tag pair
     *
     * Parses tag pairs:  {some_tag} string... {/some_tag}
     *
     * @access    private
     * @param    string
     * @param    array
     * @param    string
     * @return    string
     */
    function _parse_pair($variable, $data, $string)
    {
        if (FALSE === ($match = $this->_match_pair($string, $variable))) {
            return $string;
        }

        $str = '';
        foreach ($data as $row) {
            $temp = $match['1'];
            foreach ($row as $key => $val) {
                if (!is_array($val)) {
                    $temp = $this->_parse_single($key, $val, $temp);
                } else {
                    $temp = $this->_parse_pair($key, $val, $temp);
                }
            }

            $str .= $temp;
        }

        return str_replace($match['0'], $str, $string);
    }

    // --------------------------------------------------------------------

    /**
     *  Matches a variable pair
     *
     * @access    private
     * @param    string
     * @param    string
     * @return    mixed
     */
    function _match_pair($string, $variable)
    {
        if (!preg_match("|" . preg_quote($this->l_delim) . $variable . preg_quote($this->r_delim) . "(.+?)" . preg_quote($this->l_delim) . '/' . $variable . preg_quote($this->r_delim) . "|s", $string, $match)) {
            return FALSE;
        }

        return $match;
    }

}
// END Parser Class

/* End of file Parser.php */
/* Location: ./system/libraries/Parser.php */
